One of the common use of a diagram is the Activity diagram. Purpose of Activity Diagrams. The basic purposes of activity diagrams are similar to the other four diagrams. It captures the dynamic behavior of the system. Other four diagrams are used to show the message flow from one object to another but activity diagram is used to show message flow from one activity to another.

Using graphs, diagrams and images. Sometimes using words is not the most effective way to communicate. Using graphs, diagrams and charts can help your reader to get a clearer picture of your research findings and how they compare with other data.

A diagram is a symbolic representation of information according to some visualization technique. Diagrams have been used since a long time ago but became more prevalent during the industrialization. Sometimes, the technique uses a three-dimensional visualization which is then projected onto a two-dimensional surface.